Oracle’s latest update to the GraalVM multi-language runtime offers compiler and native image usability improvements, along with enhancements geared to specific languages.

GraalVM 21.2, published July 20, is available among community and enterprise editions from the project website. For the compiler, the update features optimizations including improved loop limit analysis for counted loops, enabling the compiler to analyze control flow preceding the loop to reason about induction variables. This can make more uncounted loops amenable for advanced optimizations. Compilation of code using typical StringBuilder patterns also has been improved, with enhanced support for these patterns in JDK 11-based GraalVM builds due to awareness of compact strings in JDK 11.

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